Square Roots and Imaginary Numbers

Solve.  
x² +12 = 5

• x = ± 49

• x = ± i√7

• x = ± √7

• x = ± 3.5i

Tags

CCSS.HSA-REI.B.4B

Evaluate the square root of -25.

• 5i

• 0

• 25

• -5i

What is the square root of -9?

• -3i

• 9

• 0

• 3i

What is the square root of -49?

• -7i

• 0

• 7i

• 49

Evaluate the square root of -64.

• 64

• -8i

• 0

• 8i

Simplify √-4

• 2i

• -2i

• 2

• 4i

Simplify √-81

• -√81

• -9i

• 9i

• 81i

Simplify -√-8

• -i√8

• -2i√2

• 2i√2

• -8i

Simplify -√-48

• 4i√3

• -4i√3

• i√48

• -48i

Simplify √-28

• -√28

• -2i√7

• 2i√7

• 28i